Improvement in sectional steam-generators



2 Shee ts-Sheet 1. M; B. BUELL.

SECTIONAL STEAM GENERATOR. Patented Sept. 25, 1876.

No.18Z,540.

ZSheets-SheetZ. M. B..BUELL'.

SECTIONAL STEAM GENERATOR. No.182,640. Patented Sept.26.1876.

MORRIs B. BUELL, or DUNKIBK, NEW YORK, Assieuou'or ONE-HALF Hrs RIGHT TO H. G. BRUNDAGE, OF SAME PLACE.

IMPROVEMENT IN SECTIONAL STEAM-GENERATORS.

Specification forming part of Letters Patent No. 182,640, dated September 26, 1876; application filed February 7.1876.

To all whom it may concern:

Be it known that I, MORRIS B. BUELL, of Dunkirk, in the county of Chautauqua and State of New York, have invented certain new and useful Improvements in Steam-Generators, which improvements are fully set forth in the following specification, reference being had to the accompanying drawings. 7 My invention relates to an apparatus designed to generate steam under a low pressure for heating purposes, and composed of a cylindrical water-space surrounding the fire-pot, and a number of annular water and steam spaces, arranged horizontally above the same, and connected by suitable pipes, as will be hereinafter more fully described.

In the accompanying drawings, Figure 1 is a vertical section of my improved steam-generator in line .10 m, Fig. 4. Fig. 2 is a similar section in line y y, Fig. 3. Fig. 3 is a horizontal section in line 2 2, Fig. 2. Fig. 4 is a top-plan view of the fire-pot and surrounding water-chamber.

Like letters of reference refer to like parts in each of the figures.

A represents the fire pot; B, the waterchamber surrounding the same (L the grate and G, the ash-pit. The water-chamberB is made in the form of a hollow ring, resting with its flat bottom upon the base supports 1) of brick or other suitable material, and having its sides slightly tapering upwardly to facili tate the casting of the chamber B, the latter being cast complete in one piece in an obvious manner. D D represent a number of annular water and steam chambers or hollow rings, arranged horizontally above the chamber B, one above the other, as clearly shown in the drawin gs. The rings D D and the chamber B on its upper side are provided with a corresponding number of hollow bosses or short pipes, 61, fitting tightly upon each other, and forming communications between the different rings D D and the chamber B. The rings D D and chamber B are held together by vertical tierods 6 running through the pipe-connection d, the lower ends of the tie-rods being preferably screwed into a boss onthe bottom of the chamber B, while the upper ends are secured by screw-nuts, as clearly shown in Fig. 1. F is a coalmagazine or feed-cylinder arranged centrally above the fire-pot, so as to be surrounded bythe rings D D, and f the feedspout thereof, extending outwardly through the casing or brick-work inclosing the apparatus.

The rings or annular spaces D D are preferably made of unequal diameters, the ring D directly above the chamber B being made of such size as to fit snugly around the magazine F, while leaving an open space between its circumference and the inclosing case or brickwork G of the apparatus. The next higher ring D is made of larger diameter, so as to fit with its outside against the inclosing case Gr,

leaving an open space between its inner surface and the magazine F. The next higher ring D is made of the same size as the first ring D, and the next following ring of the same size as the ring D, and so on through the whole apparatus. By this arrangement of the rings D D the course of the products of combustion from the fire-pot upward will be somewhat like a reversed curve, as indicated by arrows in Fig. 2, touching the entire surface of the rings D D, excepting the inner surface of the rings D and the outer surface of the rings D. The rings D are preferably made round on their outside, and the rings D round on their inside, so that the reversal of the current of hot gases around the rings is rendered so easy as not to interfere with the draft. The rings D are made straight on their inner side, so that their inner walls may form part of the coal-magazine or feed-cylinder F, the walls of themagazine between the rings D being formed by interposed cylinders h.

The top ring D is preferably made somewhat higher than the rest of the rings, so as to form a steam-dome, from which the steam is taken by a pipe, i. It is the smokepipe, arranged centrally in the upper ring D, and connected with the chimney in any suitable manner. lrepresents the feed-water pipe,

and m the return-water pipe, tapping into the water-chamber B at any convenient point. The water-chamber B, being formed Without any fuel-openings in its side, presents an un broken surface to the direct action of the burn- A'IENT omen" height above the fire-pot.

ing fuel, andis therefore better adapted to abstractthe heat therefrom, and more readily I Myimproved steam-generator is very strong and compact, and constructed at comparative- 1y small expense, and forms a Very efllcient' generator,.as the heat involvedby the fuel is utilized therein to the utmost extent.

What claim asmy invention is- The combination, with the chamber B, fuelmagazine F, and easing G, of the alternating smaller and larger horizontal rings D D, so as to form a winding passage for the products of combustion, substantially as and for the purpose hereinbefore set forth.

MORRIS B. BUELL. Witnesses:

MELVIN F. STEPHENS, '1. O. TAYLOR. 

